Tag: mainframe

Questions Related to mainframe

To receive input from the screen, we use the command:
technology mainframe

  1. READ

  2. PULL

  3. ACCEPT

  4. RECEIVE

Show answer
Correct Option: B

Indicate the correct statement: REXX functions consist of a function name, immediately followed by its arguments coded between parentheses and separated by commas.

technology mainframe

  1. This is only true if there are arguments, otherwise the parentheses must be excluded.

  2. This is also true if there are no arguments, but the parentheses can be omitted.

  3. This is also true if there are no arguments, the parentheses must be included.

  4. This is always true, since there are no functions without arguments.

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Correct Option: C

Given that var_1 = 'Abc123', what is the result of DATATYPE(var_1,N)?

technology mainframe

  1. '123'

  2. 'Abc123'

  3. 1

  4. 0

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Correct Option: D

What is the result of TRUNC(12.3456,3)?

technology mainframe

  1. 12.3

  2. 12.3000

  3. 12.346

  4. 12.345

Show answer
Correct Option: D

AI Explanation

To answer this question, you need to understand the TRUNC function.

The TRUNC function is used to truncate a number to a specified number of decimal places. It removes all decimal places beyond the specified number without rounding the number.

In this case, the TRUNC(12.3456, 3) means truncating the number 12.3456 to 3 decimal places.

Let's evaluate each option:

Option A) 12.3 - This option is incorrect because it only has one decimal place, while the TRUNC function truncates the number to 3 decimal places.

Option B) 12.3000 - This option is incorrect because it has four decimal places, while the TRUNC function truncates the number to 3 decimal places.

Option C) 12.346 - This option is incorrect because it has three decimal places, while the TRUNC function truncates the number to 3 decimal places and removes the decimal places beyond that.

Option D) 12.345 - This option is correct because it has three decimal places, which matches the result of the TRUNC(12.3456, 3) function.

Therefore, the correct answer is D) 12.345.

Complete correctly: When calling a subroutine with the clause CALL 'SUBROUT1',...

technology mainframe

  1. the external subroutine SUBROUT1 will be executed, bypassing any internal subroutines.

  2. the internal subroutine SUBROUT1 will be executed; external subroutines aren't called.

  3. the internal subroutines will be searched for SUBROUT1; only if there isn't an internal one, the external SUBROUT1 will be executed.

  4. an error will occur; subroutine names must never be coded between quotes.

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Correct Option: A

How can an in-stream dataset be terminated
technology mainframe

  1. //

  2. //*

  3. /*

  4. None of the above

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Correct Option: C

What is the function of the DD DCB keyword
technology mainframe

  1. Begins the subparameters of the DCB

  2. Begins the DASD control block

  3. Marks the close of the DCB

  4. Modifies the record type parameters

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Correct Option: A

Concerning the shielding of variables of an internal subroutine from the main EXEC part, which of the following is correct:
technology mainframe

  1. One can not shield variables in a subroutine from the main EXEC, only from other subroutines.

  2. One can shield the variables by using the clause: CALL SUBROUT1 PROCEDURE

  3. One can shield the variables by defining the start clause of a subroutine:SUBROUT1: PROCEDURE

  4. One can shield the variables by defining the start clause of a subroutine: SUBROUT1: SHIELDED

Show answer
Correct Option: C

What is the maximum length of a single line of JCL
technology mainframe

  1. 71 bytes

  2. 60 bytes

  3. 55 bytes

  4. 80 bytes

Show answer
Correct Option: A
Explanation:

To solve this question, the user needs to have knowledge of Job Control Language (JCL).

The maximum length of a single line of JCL is an important consideration while writing mainframe JCL. JCL statement can be continued onto the next line by inserting a hyphen (-) in column 72 of the JCL statement. This is referred to as JCL continuation.

Now, let's go through each option and explain why it is right or wrong:

A. 71 bytes: This option is correct. The maximum length of a single line of JCL is 71 bytes. Any JCL statement that exceeds this limit should include a continuation character (-) in column 72.

B. 60 bytes: This option is incorrect. The maximum length of a single line of JCL is greater than 60 bytes.

C. 55 bytes: This option is incorrect. The maximum length of a single line of JCL is greater than 55 bytes.

D. 80 bytes: This option is incorrect. Although 80 bytes is a common length for lines of code in other programming languages, it is not the maximum length of a single line of JCL.

The Answer is: A. 71 bytes

What is the purpose of DD DUMMY statement
technology mainframe

  1. Marks a deleted DD statement

  2. Begins an interpreted command stream

  3. Specifies no space allocation & no disposition processing

  4. Suppress command processing

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Correct Option: C