9 practice sets · Page 1 of 1
Integerp and Zerop will be same __
When argument is not an integer or equal to 0
When argument is not equal to 0
When argument is a negative integer
When argument is a negative integer and not 0
Correct Answer: A — When argument is not an integer or equal to 0
Explanation:
Both integerp and zerop will be same when both will show either T or NIL. Both will show T when argument is 0 and NIL when argument is not an integer.
What is the use of zerop?
To check object is zero
To check object is NIL
To make non-zero object to zero
It is same as integerp
Correct Answer: A — To check object is zero
Explanation:
It is the predicate used to check whether the argument is zero or not. It will show T (true) only if the argument is numeric zero, that is, 0 and NIL in all other cases.
Which among these are the data type predicates?
atom
symbolp
listp & numberp
atom, symbol, listp & numberp
Correct Answer: D — atom, symbol, listp & numberp
Explanation:
Atom, symbolp, listp, numberp all are considered as data type predicates. Atom is used check if an argument is atom or not. Similarly, symbolp is used to check symbols, listp to check lists and numberp to check whether the argument is a number or not.
Which of the following is used by member primitive to compare arguments?
=
equalp
equal
eql
Correct Answer: D — eql
Explanation:
Eql is used by member argument to compare between its two arguments. Eql is one of the equality predicates and is used to test for numbers and symbols of the same type.
Which is used to produce a procedure object from a procedure name?
EQ
#'
EQUAL
None of the mentioned
Correct Answer: B — #'
Explanation:
From procedure name to produce procedure object # is used always.
What is meant by keyword argument?
Arguments that follows a keyword
Lists
Data
Procedure
Correct Answer: A — Arguments that follows a keyword
Explanation:
It is used to modify a procedure's basic behaviour along the line.
Which predicate tests to see if its first argument is an element of its second argument?
EQ
=
MEMBER
None of the mentioned
Correct Answer: C — MEMBER
Explanation:
MEMBER will return what is left of the list when the matching symbol is encountered.
Which primitive tests two arguments to see if their values are the same expression?
Equal
Eql
Eq
=
Correct Answer: A — Equal
Explanation:
Equal primitive tests two arguments to see if their values are the same expression. It works on atoms and lists.
What is a procedure that returns a value that signals true or false?
List
Predicates
Data
None of the mentioned
Correct Answer: B — Predicates
Explanation:
A predicate is a procedure that returns a value that signals true or false.
