Introduction

Question 1

Strings are ___ indexed in Go

Answer 1

0

Question 2

Integer types in Go

Answer 2

uint8, uint16, uint32, uint64, int8, int16, int32, and int64

Question 3

Three logical operators in Go

Answer 3

&& - and, || - or, ! - not

Question 4

Rules for naming variables in Go

Answer 4

1. Start with a latter

2. Can contain letters, numbers and _

Question 5

Keyword for declaring a variable in Go

Answer 5

var

Question 6

Keyword for declaring a constant in Go

Answer 6

const

Question 7

Two ways of declaring variables in Go

Answer 7

1. Using the var keyword inline

2. Using the var keyword with a block [ var (…) ]

Question 8

What scoping rules does Go use?

Answer 8

Lexcial scoping

Question 9

What options are available for controlling flow in Golang?

Answer 9

for, if and switch

Question 10

How should you write a while loop in Go?

Answer 10

for {…} or for true {…}

Question 11

What is the difference between “” and `` in Go?

Answer 11

Strings created from “” can contain only escape sequences. Strings created from `` can contain new lines and other literal.s

Question 12

How are arrays initialized in go

Answer 12

var []

Question 13

The ____ function can be used to find the length of arrays and strings in Go

Answer 13

len

Question 14

To convert between types in Go, you ______

Answer 14

Use the type names like a function

Question 15

We use the keyword _____ followed by the name of the variable we want to loop over

Answer 15

range

Question 16

A _______ is used to tell the compiler that we don’t need this variable

Answer 16

single underscore (_)

Question 17

Short syntax for creating arrays in Go

Answer 17

[]{…items…}

Question 18

The length of the slice type in Go is constant. True or false?

Answer 18

False

Question 19

What are the ways in which you can create a slice in Go?

Answer 19

1. Using the make function

2. Indexing arrays (arr[low: high])

Question 20

What are the arguments to the copy function?

Answer 20

dst (destination) and src (source)

Question 21

How should maps be created in Go?

Answer 21

var := make(map[])

Question 22

The _____ function can be used to delete items from a map

Answer 22

delete

Question 23

What is a variadic parameter?

Answer 23

A parameter which can be used to accept multiple arguments of a single type

Question 24

How to define

Answer 24

func (args …) {}

Question 25

The ____ keyword can be used to move a function call to the end

Answer 25

defer

Question 26

Deferred function calls happen before the function returns. True of false?

Answer 26

True

Question 27

Deferred functions are run even if a runtime panic occurs. True or false?

Answer 27

True

Question 28

In Go, arguments are passed by value by default unless pointers are used. True or false?

Answer 28

True

Question 29

In Go, a pointer is represented using an ______ followed by the type of the storedvalue

Answer 29

asterisk

Question 30

An asterisk is also used to dereference pointer variables. Dereferencing a pointer givesus access to the value the pointer points to. True or false?

Answer 30

True

Question 31

What’s the difference between * and & in go?

Answer 31

• indicates that the object in question is a pointer of type . & is how this pointer is obtained.

Question 32

The _____ function takes a type as an argument, allocates enough memory to fit a value of that type,and returns a pointer to it.

Answer 32

new

Question 33

We can access fields of a struct using the ____ operator

Answer 33

.

Question 34

Embedded types in Go are an implementation of inheritance. True or false?

Answer 34

True

Question 35

How are embedded types defined?

Answer 35

type struct { …fields }

Question 36

A _______ is a list of methods that a type must have in order to implement the inter‐face.

Answer 36

method set

Question 37

What is a struct?

Answer 37

A struct is a container which contains has-a/is-a relationships.

Question 38

What is an interface?

Answer 38

An interface is a container which defines a bunch of methods which can be called.

Question 39

How are structs and interfaces related to each other?

Answer 39

If a struct is said to implement an interface, then the struct implements all the methods that the interface defines.

Question 40

To search for a smaller string in a bigger string, use the ____ function

Answer 40

strings.Contains

Question 41

To count the number of times a smaller string occurs in a bigger string, use the ______ function

Answer 41

strings.Count

Question 42

To determine if a bigger string starts with a smaller string, use the ______ function

Answer 42

strings.HasPrefix

Question 43

To determine if a bigger string ends with a smaller string, use the _____ function

Answer 43

strings.HasSuffix

Question 44

To find the position of a smaller string in a bigger string, use the _______ function

Answer 44

strings.Index

Question 45

To take a list of strings and join them together in a single string separated by anotherstring (e.g., a comma), use the __________ function

Answer 45

strings.Join

Question 46

To repeat a string, use the _________ function

Answer 46

strings.Repeat

Question 47

To replace a smaller string in a bigger string with some other string, use the _______ function, which also takes a number indicating how many times to do the replacement

Answer 47

strings.Replace

Question 48

To split a string into a list of strings by a separating string (e.g., a comma), use the function

Answer 48

strings.Split

Question 49

To convert a string to all lowercase letters, use the function

Answer 49

strings.ToLower

Question 50

To convert a string to all uppercase letters, use the function

Answer 50

strings.ToUpper

Question 51

To convert a string to a slice of bytes use the _____ function

Answer 51

byte

Question 52

the io package has a ____ function that copies data from a Reader to a Writer

Answer 52

Copy

Question 53

To read or write to a []byte or a string, you can use the ______ struct found in the ______ package:

Answer 53

Buffer, bytes

Question 54

You can convert a Buffer into a []byte by calling ________

Answer 54

Buffer.Bytes()

Question 55

To open a file in Go, use the _____ function from the __ package

Answer 55

Open, os

Question 56

The _____ function from the ____ package serves as a shortcut to opening files using os.Open

Answer 56

ioutil.ReadFile

Question 57

To create a file, use the _________ function.

Answer 57

os.Create

Question 58

To get the contents of a directory, we use the same os.Open function but give it adirectory path instead of a file name. Then we call the ______ method

Answer 58

Readdir

Question 59

The _____ function can be used to perform a specific set of operations (defined in a function) on each file and folder in a directory. The registered function is passed three arguments: ____, ____ and ___ for each file/folder in the directory.

Answer 59

os.Walk, path of the file, info of the file and err

Question 60

We can create our own errors by using the _____ function in the _____ package

Answer 60

New, errors

Question 61

The _____ package contains functions for sorting arbitrary data.

Answer 61

Sort

Question 62

The non-cryptographic hash functions can be found underneath the ____ package

Answer 62

hash

Question 63

The cryptographic hash functions can be found underneath the ____ package

Answer 63

crypto

Question 64

In Go, we can create a TCP server using the ____ package’s _____ function

Answer 64

net, Listen

Question 65

The ____ package allows us to parse arguments and flags sent to our program.

Answer 65

flag

Question 66

To create a goroutine, we use the keyword ____ followed by a _________

Answer 66

go, function invocation