Example of a contract calling another contract and exceptions are thrown. One time with a named contract call, another time with a low level function call with call.value()()

call_exception.sol

pragma solidity ^0.4.21;

contract A {
    
    /**
     * Example of a named contract call exception 
     */
    function someAException() public {
        B myContractB = new B();
        myContractB.myB();
    }
    
    /**
     * Example of address.call.value()()
     * 
     */
    function someABoolean() public {
        B myContractB = new B();
        //attention here, the call will execute because call.value() only returns a boolean
        bool successfulCall = address(myContractB).call.value(0 ether)(bytes4(keccak256("myB()")));
        if(!successfulCall) {
            //something went wrong
        } else {
            //it worked
        }
    }
}

contract B {
    function myB() public payable{
        require(msg.value == 1 ether);
    }
}