Tag: databases

Questions Related to databases

Which of the following is true about DBD ?
technology databases

  1. multiple DBD s for each database

  2. none of these

  3. cannot be used by DL/I

  4. created by a process called DBDGEN

Show answer
Correct Option: D

A segment has 3 occurrences for a parent. This segment is called a
technology databases

  1. multiple

  2. twin

  3. sibling

  4. none of these

Show answer
Correct Option: B

What information is not included in DBD
technology databases

  1. access method

  2. segment name

  3. parameter

  4. key field length

Show answer
Correct Option: C

Proc opt for path call

technology databases

  1. C

  2. P

  3. D

  4. K

  5. L

Show answer
Correct Option: B

Which of the following are not mentioned in PSB

technology databases

  1. Number of sensitive segments

  2. dataset

  3. Segment name

  4. Key value

Show answer
Correct Option: B

SENSEG NAME=CUSTOMER,PARENT=0, PROCOPT=K Referring to the code above, what is the purpose of the SENSEG statements?
technology databases

  1. To provide the database name

  2. To name the fields in the DBD

  3. To tell the program the data field segment sense sizes during any process stage

  4. To identify the segments in the database to which the application program is sensitive

Show answer
Correct Option: D

You issue a GNP call from a program and receive a status code of GP. Referring to the above scenario, which one of the following describes the cause of this error?

technology databases

  1. The segment level specified is not lower than the level of the established parent.

  2. There are no more segments for this message.

  3. The program has issued a call where no parent segment exists.

  4. An invalid length has been detected on a variable length record.

Show answer
Correct Option: C

AI Explanation

To answer this question, you need to have an understanding of the GNP (Generalized Node Program) and the possible status codes it can return.

The GNP is a program that is used to manipulate hierarchical data structures called segments. When you issue a GNP call from a program, you can receive various status codes as a response, indicating the success or failure of the operation.

In this scenario, the status code received is GP, and the cause of this error is described as:

C. The program has issued a call where no parent segment exists.

This means that the program has attempted to perform an operation on a segment without a valid parent segment. In a hierarchical structure, segments are organized in a parent-child relationship, where a child segment is nested within a parent segment. In order to perform operations on a child segment, a valid parent segment must exist.

Since the program issued a call where no parent segment exists, the GP status code is returned to indicate this error.

Therefore, the correct answer is C. The program has issued a call where no parent segment exists.

The first statement in a COBOL IMS program
technology databases

  1. DLITCBL

  2. CBLTDLI

  3. GOBACK

  4. PCB mask

  5. DBD

Show answer
Correct Option: A

What is the difference in coding between inserting segments into an existing database and loading a database?
technology databases

  1. The SSA must be qualified

  2. There is no difference.

  3. The key sequence of the data in loading

  4. There is no need for parentage in loading.

  5. The PCB processing options

Show answer
Correct Option: E

CALL ‘CBLTDLI’ USING ‘GU ‘ LS-PCB-MASK, WS-IO-AREA SEGMENTA*P SEGMENTC Based on above code what will be retrieved

technology databases

  1. Will retrieve segment C and parentage will be set at segment C

  2. Will retrieve segment C and parentage will be set at segment A

  3. Will retrieve segment A and parentage will be set at segment A

  4. Will retrieve segment A and parentage will be set at segment C

  5. Error out

Show answer
Correct Option: B

AI Explanation

To answer this question, we need to understand the purpose of the CALL statement and the parameters being passed.

In this code snippet, the CALL statement is used to call a subroutine named 'CBLTDLI'. The USING phrase is used to pass parameters to the subroutine.

The parameters being passed are:

  • 'GU ' - This is a control option indicating that the utility function should be performed.
  • LS-PCB-MASK - This is a parameter used to specify which segments should be included in the retrieval.
  • WS-IO-AREA - This is a parameter used to pass the input/output area for the utility function.

Now, let's analyze the options:

Option A) Will retrieve segment C and parentage will be set at segment C - This option is incorrect. According to the code snippet, the segment to be retrieved is determined by the value of the LS-PCB-MASK parameter, not by the CALL statement. The parentage refers to the relationship between segments, and it is not mentioned in the code snippet.

Option B) Will retrieve segment C and parentage will be set at segment A - This option is correct. The LS-PCB-MASK parameter is passed to the subroutine, indicating that segment C should be retrieved. The parentage, which refers to the relationship between segments, is not specified in the code snippet.

Option C) Will retrieve segment A and parentage will be set at segment A - This option is incorrect. The LS-PCB-MASK parameter is passed to the subroutine, indicating that segment C should be retrieved, not segment A.

Option D) Will retrieve segment A and parentage will be set at segment C - This option is incorrect. The LS-PCB-MASK parameter is passed to the subroutine, indicating that segment C should be retrieved, not segment A.

Option E) Error out - This option is incorrect. There is no indication in the code snippet that an error will occur.

Based on the analysis above, the correct answer is B) Will retrieve segment C and parentage will be set at segment A. This option aligns with the code snippet provided.