ECCouncil 312-49v11 (Computer Hacking Forensic Investigator) Practice Test 21

Question 200

A file is readable by its owner but not by unrelated users, independent of any ACL extensions. Which metadata implements the basic rule?

  1. Unix permission bits
  2. Symbolic link
  3. Ext4 extent
  4. Ext journal

Explanation

Correct Answer

A:

Owner, group and other mode bits govern traditional Unix access. They are part of inode metadata and differ from the shell command history of a user.

Incorrect Answers

B:

With basic Unix read-write-execute authorization as the investigative issue, a symbolic link stores a pathname reference rather than sharing the target inode directly; the result would concern path-based Unix filesystem redirection. It can refer across filesystems and become dangling if the target disappears; this would not resolve basic Unix read-write-execute authorization.

C:

For questions about contiguous data block ranges in ext4, extents represent contiguous logical-to-physical block ranges more efficiently than individual pointers; that differs from basic Unix read-write-execute authorization. Ext4 uses extent trees for many files; it provides no direct answer to basic Unix read-write-execute authorization.

D:

The stem asks about basic Unix read-write-execute authorization; journaling records transaction-related metadata for consistency recovery, subject to mode and retention; the described operation is used for recent filesystem metadata transactions. It should not be treated as a complete immutable audit trail; a determination about basic Unix read-write-execute authorization requires other support.

Question 201

A trainee assumes every deleted ext4 file can be restored from stale direct block pointers. Which practical limitation must be considered?

  1. Ext directory entry
  2. Unix permission bits
  3. Ext4 deletion limits
  4. Ext journal

Explanation

Correct Answer

C:

Ext4 deletion may clear extent mapping and later reuse blocks, depending on operations and mount state. Recovery is not assured merely because free space exists.

Incorrect Answers

A:

The required finding is about recovery constraints after ext4 file deletion; directory entries map names to inode numbers and may leave recoverable remnants after changes; this addresses the separate concern of name-to-inode mapping within a directory. An inode alone does not preserve every historical filename; it does not by itself answer recovery constraints after ext4 file deletion.

B:

Although the case asks about recovery constraints after ext4 file deletion, owner, group and other mode bits govern traditional Unix access; the action instead concerns basic Unix read-write-execute authorization. They are part of inode metadata and differ from the shell command history of a user; it does not establish recovery constraints after ext4 file deletion.

D:

When the investigative task is recent filesystem metadata transactions, journaling records transaction-related metadata for consistency recovery, subject to mode and retention; that differs from the question about recovery constraints after ext4 file deletion. It should not be treated as a complete immutable audit trail; that leaves recovery constraints after ext4 file deletion unresolved.

Question 202

An examiner accidentally mounts a suspect ext volume read-write, potentially replaying its journal. Which setting issue matters?

  1. Unix permission bits
  2. Filesystem mount options
  3. Ext directory entry
  4. Symbolic link

Explanation

Correct Answer

B:

Read-only and appropriate journal-replay precautions are needed because some mount paths can update filesystem state. Examination should use verified protective procedures or an image.

Incorrect Answers

A:

For the separate question of basic Unix read-write-execute authorization, owner, group and other mode bits govern traditional Unix access; the requested assessment of preventing filesystem changes when mounting evidence remains open. They are part of inode metadata and differ from the shell command history of a user; there is no direct finding about preventing filesystem changes when mounting evidence.

C:

For a separate investigation of name-to-inode mapping within a directory, directory entries map names to inode numbers and may leave recoverable remnants after changes; that is not the determination of preventing filesystem changes when mounting evidence in the stem. An inode alone does not preserve every historical filename; the evidence still must speak to preventing filesystem changes when mounting evidence.

D:

With preventing filesystem changes when mounting evidence as the investigative issue, a symbolic link stores a pathname reference rather than sharing the target inode directly; the result would concern path-based Unix filesystem redirection. It can refer across filesystems and become dangling if the target disappears; this would not resolve preventing filesystem changes when mounting evidence.

Question 203

A directory entry points to a target path string, and accessing it resolves to another location. Which Unix file type is this?

  1. Symbolic link
  2. Ext directory entry
  3. Ext journal
  4. Ext4 deletion limits

Explanation

Correct Answer

A:

A symbolic link stores a pathname reference rather than sharing the target inode directly. It can refer across filesystems and become dangling if the target disappears.

Incorrect Answers

B:

A case involving name-to-inode mapping within a directory might use this approach: directory entries map names to inode numbers and may leave recoverable remnants after changes; the required result here is path-based Unix filesystem redirection. An inode alone does not preserve every historical filename; it cannot replace proof about path-based Unix filesystem redirection.

C:

The required finding is about path-based Unix filesystem redirection; journaling records transaction-related metadata for consistency recovery, subject to mode and retention; this addresses the separate concern of recent filesystem metadata transactions. It should not be treated as a complete immutable audit trail; it does not by itself answer path-based Unix filesystem redirection.

D:

Although the case asks about path-based Unix filesystem redirection, ext4 deletion may clear extent mapping and later reuse blocks, depending on operations and mount state; the action instead concerns recovery constraints after ext4 file deletion. Recovery is not assured merely because free space exists; it does not establish path-based Unix filesystem redirection.

Question 204

An examiner finds an entry under /dev representing a disk interface rather than ordinary stored document bytes. Which file type applies?

  1. Unix permission bits
  2. Filesystem mount options
  3. Ext4 extent
  4. Unix device file

Explanation

Correct Answer

D:

Device nodes expose kernel device interfaces using major/minor numbers. Reading them can access devices, so they should not be treated as ordinary archived user files.

Incorrect Answers

A:

In an inquiry concerning basic Unix read-write-execute authorization, owner, group and other mode bits govern traditional Unix access; the scope does not extend to filesystem entry exposing a kernel device. They are part of inode metadata and differ from the shell command history of a user; that issue cannot settle filesystem entry exposing a kernel device.

B:

Even though the scenario needs filesystem entry exposing a kernel device, read-only and appropriate journal-replay precautions are needed because some mount paths can update filesystem state; the action relates to preventing filesystem changes when mounting evidence. Examination should use verified protective procedures or an image; this remains insufficient for filesystem entry exposing a kernel device.

C:

For the separate question of contiguous data block ranges in ext4, extents represent contiguous logical-to-physical block ranges more efficiently than individual pointers; the requested assessment of filesystem entry exposing a kernel device remains open. Ext4 uses extent trees for many files; there is no direct finding about filesystem entry exposing a kernel device.

Question 205

Investigators see security labels and application-specific metadata outside conventional Unix mode bits. Which feature may contain them?

  1. Ext inode
  2. Filesystem mount options
  3. Unix permission bits
  4. Linux extended attributes

Explanation

Correct Answer

D:

Extended attributes store additional name-value metadata such as security contexts and user attributes. Ordinary permission-bit inspection alone may miss their evidentiary role.

Incorrect Answers

A:

The stem asks about metadata attached beyond standard Unix inode fields; an inode stores core ext filesystem metadata and pointers or extents to data; the described operation is used for file metadata separate from directory names. Directory entries connect human-readable names to inode numbers; a determination about metadata attached beyond standard Unix inode fields requires other support.

B:

Instead of a method addressing metadata attached beyond standard Unix inode fields, read-only and appropriate journal-replay precautions are needed because some mount paths can update filesystem state; this one concerns preventing filesystem changes when mounting evidence. Examination should use verified protective procedures or an image; it cannot independently determine metadata attached beyond standard Unix inode fields.

C:

In work concerning basic Unix read-write-execute authorization, owner, group and other mode bits govern traditional Unix access; the operation would not resolve metadata attached beyond standard Unix inode fields. They are part of inode metadata and differ from the shell command history of a user; the distinction leaves metadata attached beyond standard Unix inode fields unsettled.

Question 206

A Mac contains a read-only point-in-time view of a volume made before suspicious file changes. Which mechanism may preserve that earlier state?

  1. HFS+ catalog file
  2. Unified logging
  3. Spotlight metadata index
  4. APFS snapshot

Explanation

Correct Answer

D:

APFS snapshots capture historical filesystem states using copy-on-write metadata where available. They can offer earlier versions without constituting complete backups indefinitely.

Incorrect Answers

A:

When the investigative task is file and folder metadata in a legacy Mac filesystem, the HFS+ catalog maintains file and directory records and their relationships; that differs from the question about a historical macOS volume state. It is specific to HFS+ and should not be assumed to describe APFS volumes; that leaves a historical macOS volume state unresolved.

B:

The current inquiry asks about a historical macOS volume state; apple's unified logging collects structured events from system and application components subject to privacy and retention limits; this mechanism chiefly addresses structured modern macOS system events. Forensic extraction should preserve collection context; it cannot prove a historical macOS volume state on its own.

C:

In an inquiry concerning indexed file attributes and search metadata, spotlight indexing stores searchable metadata derived from filesystem content and services; the scope does not extend to a historical macOS volume state. Its database can contain leads but may omit unindexed locations or stale entries; that issue cannot settle a historical macOS volume state.

Question 207

Two macOS files initially share storage blocks but changes to one do not modify the other. Which APFS feature explains this?

  1. APFS clone
  2. Unified logging
  3. APFS snapshot
  4. APFS space sharing

Explanation

Correct Answer

A:

APFS clones use copy-on-write sharing until modified blocks diverge. Shared initial extents do not mean the files remain logically linked after edits.

Incorrect Answers

B:

For questions about structured modern macOS system events, apple's unified logging collects structured events from system and application components subject to privacy and retention limits; that differs from copy-on-write file sharing. Forensic extraction should preserve collection context; it provides no direct answer to copy-on-write file sharing.

C:

The stem asks about copy-on-write file sharing; APFS snapshots capture historical filesystem states using copy-on-write metadata where available; the described operation is used for a historical macOS volume state. They can offer earlier versions without constituting complete backups indefinitely; a determination about copy-on-write file sharing requires other support.

D:

Instead of a method addressing copy-on-write file sharing, space sharing allows volumes in a container to draw from common free capacity, subject to quotas or reserves when configured; this one concerns flexible storage allocation among APFS volumes. It affects storage interpretation during acquisition; it cannot independently determine copy-on-write file sharing.

Question 208

A Mac volume is encrypted with per-volume keys and requires authorized unlocking before inspection. Which APFS capability is relevant?

  1. Unified logging
  2. Mac quarantine attribute
  3. APFS encryption
  4. APFS clone

Explanation

Correct Answer

C:

APFS supports native volume encryption and cryptographic key management. A physical block capture can preserve encrypted bytes without revealing their plaintext.

Incorrect Answers

A:

Although the case asks about native encryption of a macOS volume, apple's unified logging collects structured events from system and application components subject to privacy and retention limits; the action instead concerns structured modern macOS system events. Forensic extraction should preserve collection context; it does not establish native encryption of a macOS volume.

B:

For an analysis centered on download-origin labeling on macOS files, the com.apple.quarantine extended attribute may record download-origin context used by platform security features; the present need is native encryption of a macOS volume. Its presence does not prove the file is malicious; a different finding about native encryption of a macOS volume is still needed.

D:

The current inquiry asks about native encryption of a macOS volume; APFS clones use copy-on-write sharing until modified blocks diverge; this mechanism chiefly addresses copy-on-write file sharing. Shared initial extents do not mean the files remain logically linked after edits; it cannot prove native encryption of a macOS volume on its own.

Question 209

Multiple APFS volumes grow dynamically within one container rather than fixed partition quotas. Which feature is responsible?

  1. Unified logging
  2. APFS encryption
  3. Spotlight metadata index
  4. APFS space sharing
  5. FileVault protection

Explanation

Correct Answer

D:

Space sharing allows volumes in a container to draw from common free capacity, subject to quotas or reserves when configured. It affects storage interpretation during acquisition.

Incorrect Answers

A:

The objective here is flexible storage allocation among APFS volumes; apple's unified logging collects structured events from system and application components subject to privacy and retention limits; the option would instead inform structured modern macOS system events. Forensic extraction should preserve collection context; it is not direct evidence of flexible storage allocation among APFS volumes.

B:

For a separate investigation of native encryption of a macOS volume, APFS supports native volume encryption and cryptographic key management; that is not the determination of flexible storage allocation among APFS volumes in the stem. A physical block capture can preserve encrypted bytes without revealing their plaintext; the evidence still must speak to flexible storage allocation among APFS volumes.

C:

With flexible storage allocation among APFS volumes as the investigative issue, spotlight indexing stores searchable metadata derived from filesystem content and services; the result would concern indexed file attributes and search metadata. Its database can contain leads but may omit unindexed locations or stale entries; this would not resolve flexible storage allocation among APFS volumes.

E:

The stem asks about flexible storage allocation among APFS volumes; fileVault protects macOS data at rest using disk encryption integrated with platform security; the described operation is used for full-disk confidentiality on a Mac. Booting into another environment does not automatically bypass protected storage; a determination about flexible storage allocation among APFS volumes requires other support.

Question 210

An older Mac filesystem stores mappings for files and folders in a B-tree-based metadata structure. Which HFS+ artifact is central?

  1. APFS encryption
  2. Mac quarantine attribute
  3. Spotlight metadata index
  4. HFS+ catalog file

Explanation

Correct Answer

D:

The HFS+ catalog maintains file and directory records and their relationships. It is specific to HFS+ and should not be assumed to describe APFS volumes.

Incorrect Answers

A:

A case involving native encryption of a macOS volume might use this approach: APFS supports native volume encryption and cryptographic key management; the required result here is file and folder metadata in a legacy Mac filesystem. A physical block capture can preserve encrypted bytes without revealing their plaintext; it cannot replace proof about file and folder metadata in a legacy Mac filesystem.

B:

The required finding is about file and folder metadata in a legacy Mac filesystem; the com.apple.quarantine extended attribute may record download-origin context used by platform security features; this addresses the separate concern of download-origin labeling on macOS files. Its presence does not prove the file is malicious; it does not by itself answer file and folder metadata in a legacy Mac filesystem.

C:

Although the case asks about file and folder metadata in a legacy Mac filesystem, spotlight indexing stores searchable metadata derived from filesystem content and services; the action instead concerns indexed file attributes and search metadata. Its database can contain leads but may omit unindexed locations or stale entries; it does not establish file and folder metadata in a legacy Mac filesystem.

Computer Hacking Forensic Investigator (312-49v11) Practice Tests