Converting between variable data types

Printing out of the program’s results

which of the following is true about a Top-down approach

The Main procedure is defined first with other subs to follow

The detailed list of all operations is drawn up first before we can start planning

We start from the top of the program and complete the algorithm by getting to the bottom of it

Functions can’t be included as they can’t be directly called by procedures.

Which of the following are benefits of Structured code

Reduces the number of lines of code

Makes code easier to read and debug

Variable scope refers to

Whether the variable is global or local

Logic errors associated with a variable

Which of these is NOT an advantage of parameter passing

Parameter passing makes it easier to use global variables

The same subprogram can be reused in more cases

Can cut down on the use of wasteful global variables

The main difference between procedures and functions is..?

Functions return values while procedures don’t

Procedures are usually longer and have more instructions

Functions use parameter passing while procedures don’t

Functions are more difficult to debug

If a procedure is converted to a function it usually causes what effect

Reduces the number of global variables

Makes it more difficult to use selection

From this statement: a=getChoice() we can see that

getChoice() is a global variable

Trying to use a local variable outside its scope will cause what?

A crash with a report “Unknown variable”

A global variable to be overwritten by it

Which of these statements is correct

showResults(choice;cutoff) is a function

Nested iteration structures can share the same counter variable

the ELSE IF keywords are used when

Our selection needs to work with more than two choices

Our selection needs to work with more than three choices

SELECT CASE,SWITCH statement is not available

Which of these statements is correct

SELECT CASE is the same concept as SWITCH

SELECT CASE is more popular then IF,ELSE IF,ELSE

We can’t have more than 5 levels of nested IF,ELSE IF,ELSE

FOR loops are known as condition-controlled iteration

Innested selection statements which of the following statements is true

The outside selection structure gets executed first

The inside selection structure gets executed first

Integers must be used instead of Booleans

Whch of these expressions is invalid

Any FOR loop can be rewritten as a WHILE loop

Which of the following statements about arrays is not true?

The use of iteration makes arrays less relevant

All array elements have the same data type

Arrays have fixed size that can’t be easily changed during a program run

Names[LEN(Names)] is the last element of the array Names

Which of the the following statements involving arrays is not a correct statement

NewArray=SPLIT(MID(“War and Peace”;2,5);”,”)

In Record structures, VARCHAR keyword means

A field can be up to a certain number of characters or bytes in length

A field can be any number of characters or bytes in length

The name of the field is about to be changed

Which of the following statements is true about Records

Records can combine multiple data types in their fields

Which of the following statements is true about SQL

SQL usually runs on top of another language

It has loops just like any other language

SQL is hard to read due to a lot of abbreviated keywords

The purpose of SELECT * FROM Pupils WHERE Result>90 is

To retrieve a collection of records of Pupils but only those whose result is over 90

To set every Pupil’s result to 90

To retrieve a collection of records of Pupils but only those whose result is 90

To retrieve a collection of records of Pupils but only those whose name is over 90

The LIKE operator is used to

To use partial matching when searching

Approve SQL statements before execution

Replace the WHERE statement When we deal with Boolean fields

Nested SELECT queries are used

When retrieving data from multiple tables

When Boolean operators get too complex

For validation and quality control

In conditional loops when READING FROM a file

To indicate the end of a line with a formatting delimiter

In conditional loops when WRITING TO a file

Destructive overwriting of the file’s data

Which of the following statements is NOT a reason to close files

The program will not run otherwise

Files kept open after we stopped needing them is wasted memory

If we don’t close a file, our program will keep on changing the data inside it

A proper EOF will not be written

Which of the following statements is true about working with text files

We read and write them one line at a time

The file has to exist before we can write to it

The changes are saved when we write to it, not when we close the file

We use counter-controlled loops to read them

Which of the following is a valid way to write a 2D array to a text file

Concatenate each row to a string with commas and then concatenate all rows with New Line characters, or write rows with WRITELINE

Split the text file into an array, copy all elements to this array

Use SQL to convert 2D array to records first

2.2 Programming Techniques

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Practice Problem

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Hard

Natalie Graco

Used 2+ times

FREE Resource

50 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The following is NOT true about variable names

They should be descriptive

They must be in capital letters

They can’t start with numbers or contain spaces

They point to memory locations

MULTIPLE CHOICE QUESTION

30 sec • 3 pts

In an assignment operation,what appears on the right hand side

Label for a variable that is destination of data

Multiple variables that are destinations for data

Source variables or operations

The assignment operator

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

which of the following is not a valid constant

SPACE

UserName

WORDLIMIT

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a valid keyword for output?

SHOW

DISPLAY

INPUT

MULTIPLE CHOICE QUESTION

30 sec • 3 pts

Consider the following expression: a=b. This means

a will always be equal to b

b is being renamed into a

The value of memory location a gets copied into memory location b

The value of memory location b gets copied into memory location a

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is not a valid data type?

Real

String

Character

Fraction

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Quotation marks around a variable’s identifier imply

It is an integer

It is a string

It is a Boolean

It is a real

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Consider the following expression: a=b. This means

Which of the following is not a valid data type?

Quotation marks around a variable’s identifier imply

The multiplication table is best displayed using this data type

This variable type can only have True or False values

Casting refers to:

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