Tag: programming languages

Questions Related to programming languages

C++ provides facility to specify that the compiler should match function calls with the correct definition at the run time. This process is called as
technology programming languages

  1. Static binding

  2. Dynamic binding

  3. -

  4. --

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Correct Option: B

In Java, to copy the contents of a to a new Foo object b
technology programming languages

  1. Foo b = a;

  2. Foo b = a.clone();

  3. Foo b;b=a;

  4. -

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Correct Option: B

In C++, this pointer is used by the symbol___
technology programming languages

  1. . (dot)

  2. ,

  3. ->

  4. >

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Correct Option: C

C++ is normally compiled directly to machine code which is then executed directly by the operating system
technology programming languages

  1. True

  2. False

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Correct Option: A

In Java ,the statement Foo d = c; binds d to reference the same object as c, what will be equivalent statement in C++
technology programming languages

  1. Foo d = c;

  2. Foo *d = c;

  3. Foo d; d=c;

  4. --

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Correct Option: B

A Cartesian product is returned when
technology programming languages

  1. join conditions are not specified in a PROC SQL join.

  2. join conditions are not specified in a PROC SQL set operatio

  3. more than two tables are specified in a PROC SQL join.

  4. the keyword ALL is used with the OUTER UNION operator.

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Correct Option: A

Consider this PROC SQL query: proc sql; select flightnumber, count(*) as Flights, avg(boarded) label="Average Boarded" format=3. from sasuser.internationalflights group by flightnumber having avg(boarded) > 150; The table Sasuser.Internationalflights contains 201 rows, 7 unique values of FlightNumber, 115 unique values of Boarded, and 4 different flight numbers that have an average value of Boarded that is greater than 150. How many rows of output will the query generate?
technology programming languages

  1. 150

  2. 7

  3. 4

  4. 1

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Correct Option: C

Which statement about the following PROC SQL query is false? proc sql; validate select name label=’Country’, rate label=’Literacy Rate’ from world.literacy where ’Asia’ = (select continent from world.continents where literacy.name = continents.country) order by 2;
technology programming languages

  1. The query syntax is not valid.

  2. The outer query must pass values to the subquery before the subquery can return values to the outer query.

  3. PROC SQL will not execute this query when it is submitted.

  4. After the query is submitted, the SAS log will indicate whether the query has valid syntax.

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Correct Option: A

In order for PROC SQL to perform an inner join,
technology programming languages

  1. the tables being joined must contain the same number of columns.

  2. the tables must be sorted before they are joined

  3. the columns that are specified in a join condition in the WHERE clause must have the same data type.

  4. the columns that are specified in a join condition in the WHERE clause must have the same name.

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Correct Option: C

A PROC SQL inner join can combine
technology programming languages

  1. a maximum of 2 tables or in-line views, but multiple joins can be chained together.

  2. a maximum of 32 tables or 2 in-line views.

  3. a maximum of 32 tables, which includes any tables referenced by an in-line view.

  4. a maximum of 2 tables and 32 columns.

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Correct Option: C